aout.c revision 1.9.24.1
1 /* $NetBSD: aout.c,v 1.9.24.1 2009/01/15 23:20:02 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Leo Weppelman. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40 #ifdef TOSTOOLS 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <string.h> 45 #include <sys/types.h> 46 #include <a_out.h> 47 48 #define MALLOC(x) malloc(x) 49 50 #else 51 52 #include <lib/libsa/stand.h> 53 #include <atari_stand.h> 54 #include <libkern.h> 55 #include <sys/exec_aout.h> 56 57 #define MALLOC(x) alloc(x) 58 #endif 59 60 #include "libtos.h" 61 #include "kparamb.h" 62 #include "tosdefs.h" 63 #include "cread.h" 64 65 66 #ifdef TOSTOOLS 67 /* 68 * Assume compiling under TOS or MINT. The page-size will always 69 * be incorrect then (if it is defined anyway). 70 */ 71 #ifdef AOUT_LDPGSZ 72 #undef AOUT_LDPGSZ 73 #endif 74 75 #define AOUT_LDPGSZ (8*1024) /* Page size for NetBSD */ 76 77 #endif /* TOSTOOLS */ 78 79 /* 80 * Load an a.out image. 81 * Exit codes: 82 * -1 : Not an a.outfile 83 * 0 : OK 84 * error# : Error during load (*errp might contain error string). 85 */ 86 int 87 aout_load(int fd, osdsc_t *od, char **errp, int loadsyms) 88 { 89 long textsz, stringsz; 90 struct exec ehdr; 91 int err; 92 93 *errp = NULL; 94 95 lseek(fd, (off_t)0, SEEK_SET); 96 if (read(fd, (char *)&ehdr, sizeof(ehdr)) != sizeof(ehdr)) 97 return -1; 98 99 #ifdef TOSTOOLS 100 if ((ehdr.a_magic & 0xffff) != NMAGIC) 101 return -1; 102 #else 103 if ((N_GETMAGIC(ehdr) != NMAGIC) && (N_GETMAGIC(ehdr) != OMAGIC)) 104 return -1; 105 #endif 106 107 /* 108 * Extract various sizes from the kernel executable 109 */ 110 textsz = (ehdr.a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1); 111 od->k_esym = 0; 112 od->ksize = textsz + ehdr.a_data + ehdr.a_bss; 113 od->kentry = ehdr.a_entry; 114 115 if (loadsyms && ehdr.a_syms) { 116 err = 1; 117 if (lseek(fd, ehdr.a_text+ehdr.a_data+ehdr.a_syms+sizeof(ehdr), 118 0) <= 0) 119 goto error; 120 err = 2; 121 if (read(fd, (char *)&stringsz, sizeof(long)) != sizeof(long)) 122 goto error; 123 err = 3; 124 if (lseek(fd, sizeof(ehdr), 0) <= 0) 125 goto error; 126 od->ksize += ehdr.a_syms + sizeof(long) + stringsz; 127 } 128 129 err = 4; 130 if ((od->kstart = (u_char *)MALLOC(od->ksize)) == NULL) 131 goto error; 132 133 /* 134 * Read text & data, clear bss 135 */ 136 err = 5; 137 if ((read(fd, (char *)(od->kstart), ehdr.a_text) != ehdr.a_text) 138 ||(read(fd,(char *)(od->kstart+textsz),ehdr.a_data) != ehdr.a_data)) 139 goto error; 140 bzero(od->kstart + textsz + ehdr.a_data, ehdr.a_bss); 141 142 /* 143 * Read symbol and string table 144 */ 145 if (loadsyms && ehdr.a_syms) { 146 long *p; 147 148 p = (long *)((od->kstart) + textsz + ehdr.a_data + ehdr.a_bss); 149 *p++ = ehdr.a_syms; 150 err = 6; 151 if (read(fd, (char *)p, ehdr.a_syms) != ehdr.a_syms) 152 goto error; 153 p = (long *)((char *)p + ehdr.a_syms); 154 err = 7; 155 if (read(fd, (char *)p, stringsz) != stringsz) 156 goto error; 157 od->k_esym = (long)((char *)p-(char *)od->kstart +stringsz); 158 } 159 return 0; 160 161 error: 162 #ifdef TOSTOOLS 163 { 164 static char *errs[] = { 165 /* 1 */ "Cannot seek to string table", 166 /* 2 */ "Cannot read string-table size", 167 /* 3 */ "Cannot seek back to text start", 168 /* 4 */ "Cannot malloc kernel image space", 169 /* 5 */ "Unable to read kernel image", 170 /* 6 */ "Cannot read symbol table", 171 /* 7 */ "Cannot read string table" 172 }; 173 *errp = errs[err]; 174 } 175 #endif /* TOSTOOLS */ 176 177 return err; 178 } 179
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